406402401 has 8 divisors (see below), whose sum is σ = 541963584. Its totient is φ = 270888080.

The previous prime is 406402393. The next prime is 406402411. The reversal of 406402401 is 104204604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406402401 - 2³ = 406402393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (406402411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24655 + ... + 37691.

It is an arithmetic number, because the mean of its divisors is an integer number (67745448).

Almost surely, 2^406402401 is an apocalyptic number.

It is an amenable number.

406402401 is a deficient number, since it is larger than the sum of its proper divisors (135561183).

406402401 is a wasteful number, since it uses less digits than its factorization.

406402401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23431.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 406402401 is about 20159.4246197653. The cubic root of 406402401 is about 740.7166183158.

The spelling of 406402401 in words is "four hundred six million, four hundred two thousand, four hundred one".